Question 461485: jenna has a total of 23 coins, made up of dimes and nickels. if she has a $1.90, how many nickels and dimes does she have?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! jenna has a total of 23 coins, made up of dimes and nickels. if she has a $1.90, how many nickels and dimes does she have?
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Equations:
d + n = 23 coins
10d+5n=190 cents
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Divide thru the lower equation by 5:
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d + n = 23
2d + n = 38
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Subtract and solve for "d":
d = 15 (# of dimes)
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Solve for "n":
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d + n = 23
15 + n = 23
n = 8 (# of nickels)
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Cheers,
Stan H.
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